Boiler.



Patented july I6, |901.

No. 678,6l5.

P. FURG.

BDILEB.

(Application led Nov. 27, 1899.)

(No Model.)

III..

n. 24 'me mums Persns cov. Mutauwo. wAsmncTn n.

PETER FORG, OF SOMERVILLE, MASSACHUSETTS.

BOILER.

SPECIFIGATION forming' part of Letters Patent No. 678,615, dated July 16, 1901, Application filed November 27, 1899. Serial No. 738,322. (No model.)

' ings, is a specication, like characters on the drawings representing like parts.

This invention has for its object to provide a simple, strong, yet light, durable, and ehicient boiler, especiallydesigned, among other uses, to be employed on automobile vehicles.

For this purpose the boiler is made of sheet metal, preferably steel, and the cylinder or shell is reinforced by one or more coils of Wire or metal bands wound on the outside of the same, and thereafter the boiler is covered on its inner and outer sides with a layer or coating of non-corrodible metal, preferably brass, but which may be tin, Zinc, lead, aluminium, or their alloys, which is effected by immersing the boiler in a bath of suitable flux and then into a bath of molten non-corrodible metal. The boiler is provided with tire-tubes, extended through its heads or opposite end plates and secured thereto by expanding or upsetting said tubes, or by both operations. The layer or coating of non-corrodible metal is applied to the boiler before the fire-tubes are placed in position, and after said tubes have been secured to the heads of the boiler the opposite ends of the boiler are again immersed in the bath of molten non-corrodible metal. In this manner the heads or end plates are firmly secured to the cylinder or shell and Weak joints thereby strengthened, and, further, the reinforcing coil or coils of wire are firmly secured or bound together and to the boiler-shell, thus materially strengthening the said shell.

The non-corrodible metal covering the inner side of the boiler-shell protects the same against corrosion and also strengthens the joints between the heads or end plates and the boiler-shell.

The non-corrodible metal on the inner side of the boiler enables the cylinder or body portion to be made of steel; but it is also advantageous when the cylinder or body portion is made of sheet-copper and the heads of steel,

as it protects the said heads against corrosion and also strengthens the joints between said heads and copper cylinder.

The boiler may and preferably will be of a construction, as will be described, whereby the burner employed therewith may be received within the cylinder or body portion and be attached thereto. The burner referred to may and preferably will be of novel construction, as will be described.

These and other features of this invention will be pointed out in the claims at the end of this specification.

Figure 1 is a top or plan view of a boiler embodying this invention; and Fig. 2, a ver tical section on the line 2 2, Fig. l.

Referring to Fig. 2, a represents the boilercylinder or body portion, which may' and preferably will be made of steel, preferably sheet-steel, welded, riveted, or otherwise secured together. The cylinder a receives Within it the heads b c, of sheet-steel, which may be struck up from a iiat plate to form the annular flanges d e, and the said flanges may be secured to the shell a by rivets f g. The cylinder o, is provided, as shown, with two coils or windings 7i, of wire or metal bands, which iill the space between the rivets f g and reinforce the said cylinder. The heads b c are provided with suitable holes or openings, through which the fire-tubes t' are extended; but before said fire-tubes are placed in position the boiler-shell, with the Wire wound on its cylinder, is immersed in a suitable flux, and then in a bath of molten brass or other non-corrodible metal,which enters the boilershell through the holes in the heads b c and covers the inner side of the boiler-shell with a layer or coating j of non-corrodible metal, which also lls up all joints on the inner side of the boiler-shell. The non-corrodible metal also forms a layer or coating 7c on the outer side of the boiler and not only fills up the joints on the outer side of the boiler, but also binds the coils h of wire iirinly together and to the boiler, thereby greatly increasing the strength of the boiler, and especially its cylinder or body portion.

After the layers or coatings of non-corrodible metal have been applied to the boilershell, as described, the fire-tubes i are ex- IOO tended through the heads b c and are secured in position, preferably, by expanding and upsetting the projecting ends of said tubes. The heads ZJ c are then again dipped into the bath of molten non-corrodible metal to strengthen the joints between said heads and iire-tubes. The boiler thus constructed is particularly adapted, among other uses, to be employed on au tomobilesfas it is light,strong, durable, cheap, and efficient. I prefer to make the cylinder ct of sufficient length to enable the head c to be secured within the same, so that its iiange will lie within the cylinder beyond its lower edge a sufficient distance to enable the burner to be placed Within the cylinder a so that its bottom will be substantially Hush with the lower edge of the cylinder.

The flange e forms a shoulder, against which the upper side of the burner bears, and its lower side or bottom may rest on lugs or hangers m, attached to the cylinder and be supported in part by said lugs and in part by the removable supply-pipe n of said burner, which pipe is extended through suitable holes in the cylinder a, flange e, and the burner, substantialy opposite to the lugs m, two or more lugs being used. The burner referred to may and preferably will be made, as herein shown, and consists of a bottom disk or plate 0 of substantially the internal diameter of the cylinder a, an upper plate struck up to form the top 2, rim 3, and flange 4:, which latter rests upon a washer 5 and is secured to the bottom plate or disk o by rivets 6. The gas-supply pipe n extends through a hole in the rim 3 into the chamber 7, formed by the top and bottom plates of the burner and the gas passes therefrom int-o air-tubes or pipes 8 through perforations 9.

The tubes or pipes 8 extend through holes in the top 2 and the bottom plate or disk o and are firmly secured thereto, and the said tubes constitute gas and air tubes. By means of the perforations 9 in the tubes 8 a free passage for the gas is afforded from the chamber 7, and these outlets are not liable to become clogged up by deposits resulting from the burning of hydrocarbons and are further protected from liability of being clogged up by dirt, dust, &c.

I claiml. The combination with a boiler provided with fire-tubes extended through its opposite head and with one or more metallic coils wound upon its cylinder or body portion, of a layer or coating of non-corrodible metal united to the inner and outer surfaces of said boiler and rmly securing the firetubes to said heads, substantially as described.

2. The combination with a boiler, comprising a metallic cylinder or body portion, and metallic heads having fire-tubes extended through and secured to them, of a layer or coating of non-corrodible metal such as described, united to the inner side of the said body portion and heads and firmly securing the lire-tubes to said heads, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

PETER FORG.

Vitnesses:

JAS. H. CHURCHILL, J. MURPHY. 

